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Question
How would you convert:
(a) Ethene into 1, 2 - dibromoethane.
(b) Ethene to bromoethane
Solution
(a) Ethene into1,2- Dibromoethene:
when bromine gas is passed into inert solvent like CCI4 Containing dissolved ethene at room temperature, one molecule of Br2 adds across the double bond togive ethylene dibromide.
\[\ce{CH2 = CH2 + Br -> CH2Br - CH2Br}\]
(b) Ethene to bromoethane:
Ethene reacts with halogen acids to form alkyl halidies.
\[\ce{CH2 = CH2 + HBr -> CH3 - Ch2Br}\]
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\[\begin{array}{cc}
\ce{H}\phantom{...}\ce{Cl}\phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\\
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|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{Cl}\phantom{..}\ce{H}\phantom{...}\ce{H}\end{array}\]
